Adhesion Between Vulcanized Rubber and Unvulcanized Rubber or Partially Vulcanized Rubber

This chapter deals with the mechanisms and factors involved in the adhesion between unvulcanized rubber to vulcanized rubber and partially vulcanized rubber to vulcanized rubber. In the first case, the adhesion between the two symmetric or asymmetric rubber layers is dictated by the magnitude of the diffusing rubber chains across the interface mostly from the unvulcanized rubber layers. The diffusion of the elastomer chains from the unvulcanized portion into the vulcanized portion and subsequent crosslinking will help to stitch and repair the damaged vulcanized rubber layer. There are research papers which describe adhesion between vulcanized rubber and partially vulcanized rubber and adhesion between vulcanized rubber and unvulcanized rubber. The adhesion strength between surface-modified vulcanized EPDM rubber and unmodified natural rubber was studied by the 180° peel test.